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A local store claims that it averages 483 customers per day entering the facility with a standard deviation of 112 customers. To test this claim, you...

A local store claims that it averages 483 customers per day entering the facility with

a standard deviation of 112 customers. To test this claim, you select a random

sample of 48 business days.

a.

What is the standard error of the sample mean?

b.

What

is the

probability of obtaining a sample mean of 522 or more?

c.

What is the probability of obtaining a sample mean within 32 customers of

the

population mean?

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